# Export poor man's flight log

import errno
import os
from os.path import join
from sys import platform
import time

from config import config
from companion import ship_map, commodity_map


logfile = None

def openlog():

    global logfile
    if logfile: return

    try:
        logfile = open(join(config.get('outdir'), 'Flight Log.csv'), 'a+b')
        if platform != 'win32':	# open for writing is automatically exclusive on Windows
            from fcntl import lockf, LOCK_SH, LOCK_NB
            lockf(logfile, LOCK_SH|LOCK_NB)
        logfile.seek(0, os.SEEK_END)
        if not logfile.tell():
            logfile.write('Date,Time,System,Station,Ship,Cargo\r\n')
    except EnvironmentError as e:
        logfile = None
        if e.errno in [errno.EACCES, errno.EAGAIN]:
            raise Exception('Can\'t write "Flight Log.csv". Are you editing it in another app?')
        else:
            raise
    except:
        logfile = None
        raise


def export(data):

    def elapsed(game_time):
        return '%3d:%02d:%02d' % ((game_time // 3600) % 3600, (game_time // 60) % 60, game_time % 60)

    querytime = config.getint('querytime') or int(time.time())

    openlog()

    logfile.write('%s,%s,%s,%s,%s,%s\r\n' % (
        time.strftime('%Y-%m-%d', time.localtime(querytime)),
        time.strftime('%H:%M:%S', time.localtime(querytime)),
        data['lastSystem']['name'],
        data['commander']['docked'] and data['lastStarport']['name'] or '',
        ship_map.get(data['ship']['name'], data['ship']['name']),
        ','.join([('%d %s' % (x['qty'], commodity_map.get(x['commodity'],x['commodity']))) for x in data['ship']['cargo']['items'] if x['commodity']!='drones'])))
    logfile.flush()